Differential



Oct. 2, 192s. 1,686,431 C. O. WYMAN DIFFERENTIAL "Filed Nov. 5, 1925 Fig. 1.

o 4 6 7c 0 o Witnesses: Inventor.-

Patented @ct. 2, 1928.

UNITE s'rrss oimanns o; WYMAN, or ANOKA, iuiimnsora,

DIFFERENTIAL.

Application filed November 5, 1925..v Serial No. 67,074;

'5 the four carrying wheels for propelling-the machine, or for any other desired purpose.

My invention relates to that particular kind I of differential. w iich permits of its being located on the driving shaft, or any other del Isired place, and relieves the axles of that bungling encumbrance so usual in the ordi- -nary automobile. v i

The machine consists of a triple differential, constructed with acent-ral, main or prime differential ha'vin its central member ri 'idl Y mounted on a central, hollow,driving shaft with a secondary differential rigidlyv attached -to'its respective side gears or flanges, the prime differential balancing the drive of the two axles, while the secondary differentials balance the drive of the carrying wheels on and 9 HTQ'PlIllOIlSfOZ the same; 10and' the respective axles.

It also'consists of a hollow, driving shaft, which-admits oil into the same and forces it out through the orifices 'in the respective shafts by centrifugal force and o1ls the same,

mounting theflanges of the secondary differs ential on hollow shafts and allowing the hollow shafts of the inner flanges-to pass loosely out through the hollow shafts of the outer fiangesand connecting the respective hollow shafts with the four carrying wheels to pro-- pel the machine.

I use various devices to accomplish this purpose. The construction of some is slightly J different, but all embody the same general principles, enoughof which are illustrated in the drawings and described in the specifications to enable those skilled in the art to construct the same, while I have pointed outin the claims the full scope of my invention.

In the accompanying drawings forming partof this specification Fig. 1 is a sectional plan of my differential.

Fig. 2 is a plan View of one of the means of connecting my differential with the four car'- rying wheels. 7

Fig. 3 is an elevation showing the oil cup located on the oil case.

Fig. 1 is an elevation showing manner of constructing the differential with worm gears,

forming an automatic'loclcing, tripledifferentialf e In the accompanying drawings forming part of this specification i Y 1 is a hollow, self-oiling central driving shaft on which the different differentials are mounted; 1 isa hole in center of themain driving shaft intofwhich oil'is' driven and forced out throughthejorifices 15, 15, 15 and 15 by centrifugalfforceito oil the respective hollow shafts; 2 is the case-of the machine; 8 is the center of the prime dif -ferential; .r and 1 areJits side 'ears;

5 and 5 are its pinions; 6 and 6 are its cases; 7, 7 7 and 7 are the cases ofthe secondary differentials which are rigidly 'attachedto the side flanges of the prime differential and are revolved with'the same;

8, 8 $8 and 8 are the side flanges of the secondary differential; 9, 9*, 9

10* are theireenters; 11and 11 arehollow shafts loosely located on the main driving shafton which 'ears'8' and 8 are ri idl anounted; 12 and 129 are hollow shafts propeller shafts journaled on supporting.

T their Fri Y 14, .145 and 14 are gears mounted on the same and intermeshing with gears 1 14,14 and 1 1 rigidly mounted on the respective hollow driving shafts 11, 11", 12 and 12, all of which are looselymounted and operated independently, the same be '4 ing oiledthrough orifices 15, 15 15 and 15 through hole "P; said oil being forced out by centrifugal force: 16,16f,

16 and 16 are supporting beams on the case, on which journals 17, 1'1", 17 and 17 are mounte l; 18 is the 011 case; 19 I and 19 are oiltubes transmitting oilfrom the main case 2 to Oll case 18; 20 is'an Oll cup located on the o l case 18; 21 and 21 are collars rigidly mounted on driving shaft 1, holding gears 4. andW in place;

Having described my machine I think it i will be'readily understood, also theworking principles, power being applied by the driving shaft 1 from the motor to the differential and distributed to the different carrying Wheels to propel the machine.

What I claim is I 1. In combination, 'adrive shaft, a primary differential having a middle gear section keyed to the shaft, said ditferentialineludmg side gears loose upon the shaft, and a differential casing carried by each side gear,

each casing having a middle gear section connected therewith, and two side gears, and

sleeves independently rotatable upon the shaft in superposed'relation, and connected with side gears of the last mentioned differentials." w l 2. A device'of the class described comprising a drive shaft, a primary differential having a middle section keyed to the shaft and including side gears loosely rotatableupon theshaft and secondary casings one attached to each side gear of the first mentioned differential, and each including middle and side I gears, the middle gear movable With its casing, the side gears of the respective secondary differentials being respectively connected With sleeves, which surround the drive shaft and rotate upon said shaft and upon each other. 7 i

3. Adevice of 'the class described comprising a drive shaft, middle and laterally arranged differentials upon the shaft, each hav-' ing a central gear and two sidegears, the side gears of the middle differential being loose upon the shaft, the central gear being keyed to the drive shaft, and superposed sleeves inner and outer traversed and supported by the drive shaft, a pair for each lateral differential, said lateral differentials having their central gears loosely rotatable upon respective inner sleeves, and having their side gears keyed to respective innerand outer sleeves, the pinions and centralgears of the lateral differentials being connected to move with respective side gears of the middle differential. q

' 4. In combination With a four Wheeled vehicle. having drive means for each Wheel, a drive shaft, middle and laterally arranged differentials encircling the shaft, each having 7 is rotatable upon the shaft.

central gears, and two side gears, the side gears of the middle differential being loose upon the shaft, the central gear being keyed to the drive shaft, superposed tubular sleeves,

inner and outer, traversed and supported by the drive shaft, a pail-for. each lateral differential, said lateral differentials having their central gears loosely rotatable upon respective inner tubular sleeves and having their side gears keyed to respective inner and outer sleeves, the pinions and central gears of the lateral differentials being connected for rotation with respective side gears of the middle differential, and means, operatively eonneeting the tubular shafts, each Withone "of the Wheel drivin means, I

5. A device or the class describedcomprising a main drive shaft, a primary dif ferential consisting of a central and tivo side gear sections all directly supported uponthesh aft, the middle section only beingkeyed thereto, a secondary differential also comprising a central andtWo side gear sections, and having a casing movable with one oft-he side gears of the primary diiferentiahthe middle gear section of the last mentioned differential being movable With the casing, and superposed sleeves to which the side gears are respectively fixed, one of the sleeves being'rotatable upon the drive shaft.

6. A device of the class described come1 ential consisting ofa centraland two side gear sections all directly supported uponthe iaft. the lllldCllHSECtlOll only being keyed thereto, secondary differentials each compris liSi-no a main drive shaft, a primary dif-' ing a central and two side gear sections and a In testimony whereof, I l ave hereunto set my hand, this 3rd day of November, 1925.

CHARLES O. WVYMAN; 

